i have the very first harmony that came out a few years ago, and it still works like a champ
survived a year+ at my parents house, and an entire year living with 3 roomates in a partyhouse
they're solid remotes, and the macro functions are aweseome, but i think they all do that
they automatically navigate all the menus in your tv for repeated tasks, and keep track of what's on, and what needs to be switched, and how to switch between sources, etc.
so regardless of whether or not your tv has a simple 'source' button, it will go through the menus and select the correct source, change your receiever, turn things on or off, all you have to do is press the source you want to watch, and it does the rest. even turns the ps2 and xbox on and off, and it's all programmed over the computer, you don't have to teach it anything, which is a blessing for things you've lost the remotes to, like my dad's old late-80's big screen that hasn't had a remote for years